Equipment photographs · 1
1 / 1 · US patent 677,476 (1901): sound-increasing device, the compressed-air amplifier later developed as the Auxetophone
US patent 677,476 (1901): sound-increasing device, the compressed-air amplifier later developed as the Auxetophone·Horace L. Short·Public domain (US patent)Why it mattered
- 01
This equipment marks a change in how live systems were designed, deployed, controlled, or heard.
- 02
Its importance is assessed in the context of professional reinforcement rather than studio or domestic listening.
Engineering record
- System role
- The profile is being expanded from manufacturer documentation and independent archival sources; unsupported numerical claims are intentionally excluded.[1]
Original pricing
No reliable period price located
2026 equivalent
Not calculated without a reliable original price.
Public price evidence was not sufficient to publish a defensible original figure.
Use in the field
Named deployments and users are included only when a citable source connects them directly to the equipment.[1]
Manuals & original documents
No authoritative manual or original document has been located for this profile.
Contribute to the record
Know more about Auxetophone?
Corrections, firsthand information, original documents, and credited photograph sources are welcome.